package com.verlet.springbootdemo.common;

/**
 * 统一返回数据
 *
 * @author verlet
 * @date 2021-02-27 00:57
 */

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;

@JsonInclude(JsonInclude.Include.NON_NULL)
// 此注解保证序列化json的时候，如果是null的对象，key也会消失
public class ServerResponse<T> {

    private final int status;
    private String msg;
    private T data;

    private ServerResponse(int status) {
        this.status = status;
    }

    private ServerResponse(int status, String msg) {
        this.status = status;
        this.msg = msg;
    }

    private ServerResponse(int status, T data) {
        this.status = status;
        this.data = data;
    }

    /**
     * 使之不在json序列化结果当中
     */
    @JsonIgnore
    public boolean isSuccess() {
        return this.status == ResponseCode.SUCCESS.getCode();
    }

    private ServerResponse(int status, String msg, T data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public int getStatus() {
        return status;
    }

    public String getMsg() {
        return msg;
    }

    public T getData() {
        return data;
    }

    public static <T> ServerResponse<T> createBySuccess() {
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode());
    }

    public static <T> ServerResponse<T> createBySuccessMessage(String msg) {
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode(), msg);
    }

    public static <T> ServerResponse<T> createBySuccess(T data) {
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode(), data);
    }

    public static <T> ServerResponse<T> createBySuccess(String msg, T data) {
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode(), msg, data);
    }

    public static <T> ServerResponse<T> createByError() {
        return new ServerResponse<>(ResponseCode.ERROR.getCode(), ResponseCode.ERROR.getDesc());
    }

    public static <T> ServerResponse<T> createByErrorMessage(String errorMessage) {
        return new ServerResponse<>(ResponseCode.ERROR.getCode(), errorMessage);
    }

    public static <T> ServerResponse<T> createByErrorCodeMessage(int errorCode, String errorMessage) {
        return new ServerResponse<>(errorCode, errorMessage);
    }
}


